package com.hjy.springbootinit.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.FileUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.github.benmanes.caffeine.cache.Cache;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.hjy.springbootinit.common.ErrorCode;
import com.hjy.springbootinit.constant.CommonConstant;
import com.hjy.springbootinit.exception.BusinessException;
import com.hjy.springbootinit.exception.ThrowUtils;
import com.hjy.springbootinit.manager.UploadToOss;
import com.hjy.springbootinit.mapper.UserMapper;
import com.hjy.springbootinit.model.dto.user.UserQueryRequest;
import com.hjy.springbootinit.model.entity.User;
import com.hjy.springbootinit.model.enums.UserRoleEnum;
import com.hjy.springbootinit.model.vo.LoginUserVO;
import com.hjy.springbootinit.model.vo.UserVO;
import com.hjy.springbootinit.service.UserService;
import com.hjy.springbootinit.utils.JwtTokenUtil;
import com.hjy.springbootinit.utils.SqlUtils;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.bean.WxOAuth2UserInfo;
import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

import static com.hjy.springbootinit.constant.UserConstant.TOKEN;
import static com.hjy.springbootinit.constant.UserConstant.USER_LOGIN_STATE;

/**
 * 用户服务实现
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
    @Resource
    private UploadToOss uploadToOss;

    @Resource
    private DefaultKaptcha defaultKaptcha;

    @Resource
    private JwtTokenUtil jwtTokenUtil;
    @Resource
    private Cache<String,String> caffeineCache;
    /**
     * 盐值，混淆密码
     */
    public static final String SALT = "yupi";
    private final long ONE_MB = 1024 * 1024L;

    @Override
    public long userRegister(String userAccount, String userName, String userPassword, String checkPassword) {
        // 1. 校验
        if (StringUtils.isAnyBlank(userAccount, userPassword, checkPassword, userName)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账号过短");
        }
        if (userPassword.length() < 8 || checkPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码过短");
        }
        // 密码和校验密码相同
        if (!userPassword.equals(checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "两次输入的密码不一致");
        }
        synchronized (userAccount.intern()) {
            // 账户不能重复
            QueryWrapper<User> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("userAccount", userAccount);
            long count = this.baseMapper.selectCount(queryWrapper);
            if (count > 0) {
                throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号重复");
            }
            QueryWrapper<User> queryWrapper2 = new QueryWrapper<>();
            queryWrapper2.eq("userName", userName);
            Long count2 = this.baseMapper.selectCount(queryWrapper2);
            if (count2 > 0) {
                throw new BusinessException(ErrorCode.PARAMS_ERROR, "账户名重复");
            }
            // 2. 加密
            String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
            // 3. 插入数据
            User user = new User();
            user.setUserAccount(userAccount);
            user.setUserName(userName);
            user.setUserPassword(encryptPassword);
            boolean saveResult = this.save(user);
            if (!saveResult) {
                throw new BusinessException(ErrorCode.SYSTEM_ERROR, "注册失败，数据库错误");
            }
            return user.getId();
        }
    }

    @Override
    public String userLogin(String userAccount, String userPassword,HttpServletRequest request) {
        // 1. 校验
        if (StringUtils.isAnyBlank(userAccount)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号错误");
        }
        if (userPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "密码错误");
        }
        // 2. 加密
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
        // 查询用户是否存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword", encryptPassword);
        User user = this.baseMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            log.info("user login failed, userAccount cannot match userPassword");
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户不存在或密码错误");
        }
        LoginUserVO loginUserVO = this.getLoginUserVO(user);
        String token = jwtTokenUtil.generateToken(loginUserVO);
        // 3. 记录用户的登录态
        request.getSession().setAttribute(TOKEN, token);
        return token;
    }

    @Override
    public LoginUserVO userLoginByMpOpen(WxOAuth2UserInfo wxOAuth2UserInfo, HttpServletRequest request) {
        String unionId = wxOAuth2UserInfo.getUnionId();
        String mpOpenId = wxOAuth2UserInfo.getOpenid();
        // 单机锁
        synchronized (unionId.intern()) {
            // 查询用户是否已存在
            QueryWrapper<User> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("unionId", unionId);
            User user = this.getOne(queryWrapper);
            // 被封号，禁止登录
            if (user != null && UserRoleEnum.BAN.getValue().equals(user.getUserRole())) {
                throw new BusinessException(ErrorCode.FORBIDDEN_ERROR, "该用户已被封，禁止登录");
            }
            // 用户不存在则创建
            if (user == null) {
                user = new User();
                user.setUserAvatar(wxOAuth2UserInfo.getHeadImgUrl());
                user.setUserName(wxOAuth2UserInfo.getNickname());
                boolean result = this.save(user);
                if (!result) {
                    throw new BusinessException(ErrorCode.SYSTEM_ERROR, "登录失败");
                }
            }
            // 记录用户的登录态
            request.getSession().setAttribute(USER_LOGIN_STATE, user);
            return getLoginUserVO(user);
        }
    }

    /**
     * 获取当前登录用户
     *
     * @param request
     * @return
     */
    @Override
    public User getLoginUser(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
//        Object userTokenValue = request.getSession().getAttribute(TOKEN);
//        jwtTokenUtil.getUserNameFromToken(userTokenValue)
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从数据库查询（追求性能的话可以注释，直接走缓存）
        long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    /**
     * 获取当前登录用户（允许未登录）
     *
     * @param request
     * @return
     */
    @Override
    public User getLoginUserPermitNull(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            return null;
        }
        // 从数据库查询（追求性能的话可以注释，直接走缓存）
        long userId = currentUser.getId();
        return this.getById(userId);
    }

    /**
     * 是否为管理员
     *
     * @param request
     * @return
     */
    @Override
    public boolean isAdmin(HttpServletRequest request) {
        // 仅管理员可查询
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
        User user = (User) userObj;
        return isAdmin(user);
    }

    @Override
    public boolean isAdmin(User user) {
        return user != null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }

    /**
     * 用户注销
     *
     * @param request
     */
    @Override
    public boolean userLogout(HttpServletRequest request) {
        if (request.getSession().getAttribute(USER_LOGIN_STATE) == null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "未登录");
        }
        // 移除登录态
        request.getSession().removeAttribute(USER_LOGIN_STATE);
        return true;
    }

    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user == null) {
            return null;
        }
        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtils.copyProperties(user, loginUserVO);
        return loginUserVO;
    }

    @Override
    public UserVO getUserVO(User user) {
        if (user == null) {
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user, userVO);
        return userVO;
    }

    @Override
    public List<UserVO> getUserVO(List<User> userList) {
        if (CollUtil.isEmpty(userList)) {
            return new ArrayList<>();
        }
        return userList.stream().map(this::getUserVO).collect(Collectors.toList());
    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String unionId = userQueryRequest.getUnionId();
        String mpOpenId = userQueryRequest.getMpOpenId();
        String userName = userQueryRequest.getUserName();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(id != null, "id", id);
        queryWrapper.eq(StringUtils.isNotBlank(unionId), "unionId", unionId);
        queryWrapper.eq(StringUtils.isNotBlank(mpOpenId), "mpOpenId", mpOpenId);
        queryWrapper.eq(StringUtils.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StringUtils.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.like(StringUtils.isNotBlank(userName), "userName", userName);
        queryWrapper.orderBy(SqlUtils.validSortField(sortField), sortOrder.equals(CommonConstant.SORT_ORDER_ASC),
                sortField);
        return queryWrapper;
    }

    @Override
    public String uploadAvatar(MultipartFile multipartFile, HttpServletRequest request) {
        User loginUser = getLoginUser(request);
        if (loginUser == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "未登录");
        }
        long userid = loginUser.getId();
        ThrowUtils.throwIf(ObjectUtils.isEmpty(multipartFile), ErrorCode.PARAMS_ERROR, "传入文件为空");
        //获取文件大小
        long fileSize = multipartFile.getSize();
        ThrowUtils.throwIf(fileSize > ONE_MB, ErrorCode.PARAMS_ERROR, "传入文件过大超过1M");
        String originalFilename = multipartFile.getOriginalFilename();
        String suffix = FileUtil.getSuffix(originalFilename);
        final List<String> list = Arrays.asList("jpg", "png", "jpeg");
        if (!list.contains(suffix)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "上传的图片格式错误");
        }
        //返回文件的地址并存入数据库
        String fileLocation = uploadToOss.uploadToOss(multipartFile);
        User user = new User();
        user.setId(userid);
        user.setUserAvatar(fileLocation);
        this.updateById(user);
        return fileLocation;
    }

    @Override
    public HashMap<String, String> genKaptchaCode(HttpServletRequest request) {
        //生成文字验证码
        String text = defaultKaptcha.createText();
        System.out.println("文字验证码"+text);
        //把生成的验证码存到java基于内存的缓存中
        String textKey = UUID.randomUUID().toString().replace("-", "");
        caffeineCache.put(textKey,text);
        //根据文字生成验证码图片
        ByteArrayOutputStream out = null;
        BufferedImage image = defaultKaptcha.createImage(text);
        out = new ByteArrayOutputStream();
        try {
            ImageIO.write(image,"jpg",out);
        } catch (IOException e) {
            log.error("生成验证码失败！"+e.getMessage());
        }
        HashMap<String, String> hashMap = new HashMap<>();
        String captchaImg = Base64.getEncoder().encodeToString(out.toByteArray());
        hashMap.put("img",captchaImg);
        hashMap.put("text",textKey);
        return hashMap;
    }
}
